# @Author:      me
# 文件创建日期:    2023-07-05 10:24
# 当前文件:       workspace/grade.py
score=input("分数多少?")
score=90
score1=90
score2=90
score3=90
score4=100
if score==("分数为%d"%score):
    print("s")
elif score==("分数为%d"%score1):
    print("b")
elif score==("分数为%d"%score2):
    print("b")
score=60
score+=79
if score==("分数为%d"%score2):
     print("B")
else:
    score<=59
    print("挂科")
a = int(input())
if 0<=a<=100:
    if a>=90:
        print("S")
    elif a>=80:#隐藏条件-->非其他if分支条件
        print("A")
    elif a>=70:
        print("B")
    elif a>=60:
        print("C")
    else:
        print("挂科")
else:
    print("输入值异常")




